WHO director general: H7N9 bird flu crisis contained

"I thank China for collecting and communicating such a wealth of information, and for collaborating so closely with WHO. Chinese officials have promptly traced, monitored, and tested thousands of patient contacts, including hundreds of health care workers," she added.

Warning that these microbes has a tendency to deliver surprises, Dr Chan explained, "Constant mutation and adaptation are the survival mechanisms of the microbial world. Going forward, we must maintain a high level of vigilance. I cannot overemphasize the importance of immediate and fully transparent reporting to WHO, and of strict adherence to your obligations set out in the International Health Regulations. I ask Member States to do everything they can to ensure that health occupies a high place on the new development agenda."